This Week's Guests:

• Bart Yasso
Bart Yasso of Runner’s World has completed races on all seven continents from the Antarctica marathon to the Mt. Kilimanjaro marathon. This week, the “Mayor of Running” talks to Boyd about his book, My Life on the Run. Yasso tells the story of his race from the lowest point in the lower forty-eight states, Death Valley, to the highest peak, the top of Mt. Whitney.

• Brian Skerry
Underwater photographer Brian Skerry tells Boyd about his recent experience photographing right whales. Boyd and Skerry discuss the future of right whales as they make a strong comeback in the Southern Hemisphere but struggle to survive in the North Atlantic. Skerry’s images of these incredible creatures can be seen in the October issue of National Geographic magazine.

• Kira Salak
For years, 2005 National Geographic Emerging Explorer Kira Salak has traveled the globe as a journalist. Now she’s trying her hand at fiction. Salak tells Boyd about some of her real-life adventures as the first woman to traverse New Guinea, the trip that inspired her first novel, The White Mary.

• Don Belt
Don Belt, senior editor of National Geographic magazine, joins Boyd in the studio to talk about India’s new superhighway, the Golden Quadrilateral. Belt’s latest article, in the October issue, finds this roadway project setting old and new cultures on a crash course.

• Joyce Poole
Since 1975, Joyce Poole has been studying elephant behavior and communication. Poole shares her experiences learning the language of the elephants and recording their low-frequency rumblings.

• Drew Alt & Wills Glasspiegel
Drew Alt and Wills Glasspiegel traveled to Africa with CARE International to record indigenous music in the communities where CARE is working to alleviate poverty. Alt and Glasspiegel tell Boyd about how they use music to tell the communities’ stories and draw attention to the plight of the poor in Africa.

• Andrew Skurka
Last year, Andrew Skurka hiked the 6,875-mile Great Western Loop through the American West, earning him National Geographic Adventure magazine’s 2007 Adventurer of the Year award. Now he’s taking on an even more dangerous and rugged hike through South Africa. Skurka tells Boyd about his most recent hiking adventures.